<template>
  <div>
    <!-- 面包屑导航区域 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
     <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
     <el-breadcrumb-item>权限管理</el-breadcrumb-item>
     <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>

    <!-- 卡片区域 -->
    <el-card>
      <!-- 添加角色按钮 -->
      <el-row>
        <el-button type="primary" @click="addRolesVisible = true">添加角色</el-button>
      </el-row>

      <!-- 角色列表区域 -->
      <el-table :data="rolesList" border stripe>
        <!-- 展开列 -->
        <el-table-column type="expand">
          <template slot-scope="scope">
            <el-row :class="['bdbottom', i1 === 0 ? 'bdtop':'','vcenter']" v-for="(item1, i1) in scope.row.children" :key="item1.id">
              <!-- 渲染一级权限 -->
              <el-col :span="5">
                <el-tag closable @close="removeRightById(scope.row, item1.id)">{{item1.authName}}</el-tag>
                <i class="el-icon-caret-right"></i>
              </el-col>
              <!-- 渲染二级和三级权限 -->
              <el-col :span="19">
                <!-- 通过 for 循环，嵌套循环二级权限 -->
                <el-row v-for="(item2, i2) in item1.children" :key="item2.id" :class="[i2 === 0 ? '':'bdtop','vcenter']">
                  <el-col :span="6">
                    <el-tag type="success" closable @close="removeRightById(scope.row, item2.id)">{{item2.authName}}</el-tag>
                    <i class="el-icon-caret-right"></i>
                  </el-col>
                  <!-- 三级权限 -->
                  <el-col :span="18">
                    <!-- eslint-disable -->
                    <el-tag type="warning" v-for="item3 in item2.children" :key="item3.id" closable @close="removeRightById(scope.row, item3.id)">
                      {{item3.authName}}
                    </el-tag>
                  </el-col>
                </el-row>
              </el-col>
            </el-row>
          </template>
        </el-table-column>
        <!-- 索引列 -->
        <el-table-column type="index"></el-table-column>
        <el-table-column label="角色名称" prop="roleName"></el-table-column>
        <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
        <el-table-column label="操作" width="300px">
          <!-- eslint-disable-next-line -->
          <template slot-scope="scope">
            <el-button size="mini" type="primary" icon="el-icon-edit" @click="showEditDialog(scope.row.id)">编辑</el-button>
            <el-button size="mini" type="danger" icon="el-icon-delete" @click="removeRoles(scope.row.id)">删除</el-button>
            <el-button size="mini" type="warning" icon="el-icon-search" @click="showSetRightDialog(scope.row)">分配权限</el-button>
          </template>
        </el-table-column>
      </el-table>
    </el-card>

    <!-- 分配权限的对话框 -->
    <el-dialog title="分配权限" :visible.sync="setRightDialogVisible" width="50%" @close="setRightDialogClosed">
      <el-tree :data="rightsList" :props="treeProps" show-checkbox node-key="id" default-expand-all :default-checked-keys="defKeys" ref="treeRef"></el-tree>
      <span slot="footer" class="dialog-footer">
        <el-button @click="setRightDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="allotRights">确 定</el-button>
      </span>
    </el-dialog>

    <!-- 添加角色对话框 -->
    <el-dialog title="添加角色" :visible.sync="addRolesVisible" width="50%" @close="addRolesClosed">
      <!-- 添加角色的内容 -->
      <el-form :model="addRolesForm" :rules="addFormRules" ref="addFormRef" label-width="100px">
        <el-form-item label="添加角色" prop="roleName">
          <el-input v-model="addRolesForm.roleName"></el-input>
        </el-form-item>
      <el-form-item label="添加描述" prop="roleDesc">
        <el-input v-model="addRolesForm.roleDesc"></el-input>
      </el-form-item>  
      </el-form>
      <!-- 底部区域 -->
      <span slot="footer">
        <el-button @click="addRolesVisible = false">取 消</el-button>
        <el-button type="primary" @click="addRoles">确 定</el-button>
      </span>
    </el-dialog>
    
    <!-- 修改角色对话框 -->
    <el-dialog title="修改角色" :visible.sync="editRolesVisible" width="50%">
      <!-- 修改角色的表单内容 -->
      <el-form :model="editRolesForm" ref="editFormRef" label-width="100px">
        <el-form-item label="角色名称" prop="roleName">
          <el-input v-model="editRolesForm.roleName"></el-input>
        </el-form-item>
        <el-form-item label="角色描述" prop="roleDesc">
          <el-input v-model="editRolesForm.roleDesc"></el-input>
        </el-form-item>
      </el-form>
      <!-- 底部区域 -->
      <span slot="footer">
        <el-button @click="editRolesVisible = false">取 消</el-button>
        <el-button type="primary" @click="editRoles">确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>

<script>
export default {
  data() {
    return {
      // 所有角色列表数据
      rolesList:[],
      // 控制分配权限对话框的显示与隐藏
      setRightDialogVisible:false,
      // 所有权限的数组
      rightsList: [],
      // 树形控件的属性绑定对象
      treeProps:{
        label:'authName',
        children:'children'
      },
      // 默认选中的节点id值数组
      defKeys: [],
      // 当前即将分配权限的id
      roleId:'',
      // 添加角色对话框的显示与隐藏
      addRolesVisible: false,
      // 添加角色的表单数据
      addRolesForm:{
        roleName:'',
        roleDesc:''
      },
      // 添加角色的验证规则对象
      addFormRules:{
        roleName:[
          {required: true, message:'请输入密码',trigger:'blur'},
        ],
      },
      // 修改角色的对话框的显示
      editRolesVisible: false,
      // 修改角色的表单数据
      editRolesForm:{},
    }
  },
  created() {
    this.getRolesList()
  },
  methods: {
    // 获取所有角色的列表数据
    async getRolesList(){
      const{data:res} = await this.$http.get('roles')

      if(res.meta.status !== 200) {
        return this.$message.error('获取角色列表失败');
      }

      this.rolesList = res.data

      // console.log(this.rolesList);
    },
    // 根据id删除对应的权限
    async removeRightById(role, rightId){
      // 弹框提示用户是否删除
      const confirmResult = await this.$confirm('此操作将永久删除该权限, 是否继续?', '提示', {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning'
        }
      ).catch(err => err)
      // console.log(confirmResult);
      // 如果用户确认删除,返回 confirm
      // 如果用户取消删除,返回 cancel
      if(confirmResult !== 'confirm') {
        return this.$message.info('取消了删除')
      }

      const {data:res} = await this.$http.delete(`roles/${role.id}/rights/${rightId}`)
      if(res.meta.status !== 200) {
        return this.$message.error('删除权限失败')
      }

      this.$message.success('删除权限成功')
      // this.getRolesList()
      role.children = res.data
    },
    // 展示分配权限的对话框
    async showSetRightDialog(role){
      this.roleId = role.id
      // 获取所有权限数据
      const {data:res} = await this.$http.get('rights/tree')

      if(res.meta.status !==200) {
        return this.$message.error('获取权限数据失败')
      }
      // 把获取的权限数据保存到data中
      this.rightsList = res.data
      console.log(this.rightsList);
      // 递归获取三级节点的id
      this.getLeafKeys(role,this.defKeys)

      this.setRightDialogVisible = true
    },
    // 通过递归的形式，获取角色下所有三级权限的id，并保存到数组中
    getLeafKeys(node, arr){
      // 如果当前节点不包含children属性，则是三级节点
      if(!node.children) {
        return arr.push(node.id)
      }

      node.children.forEach(item => this.getLeafKeys(item,arr))
    },
    // 监听分配权限对话框的关闭事件
    setRightDialogClosed(){
      this.defKeys = []
    },
    // 点击为角色分配权限
    async allotRights(){
      const keys = [
        ...this.$refs.treeRef.getCheckedKeys(),
        ...this.$refs.treeRef.getHalfCheckedKeys()
      ]

      // console.log(keys);
      const idStr = keys.join(',')
      const {data:res} = await this.$http.post(`roles/${this.roleId}/rights`,{rids:idStr})

      if(res.meta.status !== 200) {
        return this.$message.error('分配权限失败')
      }
      this.$message.success('分配权限成功')
      this.getRolesList()
      this.setRightDialogVisible = false
    },
    // 添加角色
    addRoles() {
      this.$refs.addFormRef.validate(async valid => {
        if (!valid) return
        const { data: res } = await this.$http.post('roles', this.addRolesForm)
        console.log(res)
        if (res.meta.status !== 201) {
          return this.$message.error('添加角色失败!')
        }
        this.$message.success('添加角色成功!')
        this.getRolesList()
        this.addRolesVisible = false
      })
    },
    // 监听添加角色对话框的关闭事件
    addRolesClosed(){
      this.$refs.addFormRef.resetFields()
    },
    // 展示编辑角色的对话框
    async showEditDialog(id){
      const {data:res} = await this.$http.get('roles/' + id)
      
      if(res.meta.status !== 200) {
      return this.$message.error('查询角色失败')
    }

    // console.log(res.data);
    this.editRolesForm = res.data
    this.editRolesVisible = true
    },
    // 提交修改角色的数据
    editRoles(){
      this.$refs.editFormRef.validate(valid => {
        if(!valid) return 
        this.$http.put('roles/'+ this.editRolesForm.roleId, {
            roleName: this.editRolesForm.roleName,
            roleDesc: this.editRolesForm.roleDesc
          }).then(res => {
            if(res.data.meta.status !== 200) {
              return this.$message.error('修改角色失败!')
            }
            this.$message.success('修改角色成功!')
            this.getRolesList()
          })
          this.editRolesVisible = false
      })
    },
    // 删除角色
    async removeRoles(id){
      const confirmResult = await this.$confirm('此操作将永久删除该角色, 是否继续?', '删除角色', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).catch(err => err)
      // 没有使用await
      if (confirmRsult !== 'confirm') {
        return this.$message.info('已取消该删除操作')
      }
      this.$http.delete('roles/' + id).then(res => {
        const { data: response } = res
        // console.log(response)
        if (response.meta.status !== 200) {
          return this.$message.error('该用户删除失败')
        }
        this.$message.success('该用户已经删除')
        this.getRolesList()
      })
    }
  }
}
</script>

<style lang="less" scoped>
.el-tag {
  margin: 7px;
}
.bdtop {
  border-top: 1px solid #eee;
}
.bdbottom {
  border-bottom: 1px solid #eee;
}
.vcenter {
  display: flex;
  align-items: center;
}
</style>